JP4332466B2 - Ultrasonic vibration sieve machine - Google Patents

Description

  The present invention relates to an ultrasonic vibration sieving machine.

Conventionally, an ultrasonic vibration sieving machine known from the following Patent Document 1 is provided with a resonance ring (ring resonator) fixed with an ultrasonic oscillator so as to contact the lower surface of the sieving net, By transmitting to the sieve mesh through the resonance ring and vibrating the sieve mesh, the processed materials such as various powders and granules are screened and mixed and agitated.
Japanese Patent Laid-Open No. 11-128842

  By the way, a metal sieve mesh such as a stainless steel mesh (hereinafter referred to as a metal mesh) that is generally distributed in the market has a minimum mesh size of about 20 microns, and a fine mesh mesh is difficult to manufacture. It is not commercially available, and even if it can be manufactured, it would be expensive and expensive. On the other hand, sieve mesh made of synthetic resin (hereinafter referred to as “resin mesh”) is also manufactured with fine openings of around 5 microns, and those with antistatic treatment are also offered to the market relatively inexpensively. For this reason, even with powders that have been clogged due to static electricity and difficult to screen with a metal mesh, it is possible to screen with powder using a resin mesh.

However, since the resin mesh is generally soft, when used in the above-mentioned ultrasonic vibration sieving machine, the high-frequency vibration from the resonance ring is attenuated and difficult to transmit to the processed material. There has been a problem of a significant drop.
Therefore, the present invention is intended to solve such problems in the ultrasonic vibration sieving machine.

In order to solve the problem, an ultrasonic vibration sieving machine according to claim 1 supports a vibration container on a base via a coil spring, and a vibration motor is fixed to a lower part of the vibration container. An annular resonant ring is fixed to the inside of the frame by welding a plurality of stays, an ultrasonic oscillator is fixed to the lower surface of the resonant ring, and a 100-200 mesh metal sieving net is formed on the upper surface of the resonant ring. The synthetic resin sieve mesh having a larger number of meshes than the metal sieve mesh is stacked on the metal sieve mesh in a non-adhered state, and the frame is attached to the upper end opening edge of the vibrating container. And the peripheral part of the metal sieve screen and the peripheral part of the synthetic resin screen are placed between the upper surface of the frame and the lower edge surface of the hopper. And a high frequency current of 20 kHz to 40 kHz The ultrasonic oscillator is oscillated by passing it through the ultrasonic oscillator, and the high-frequency vibration is transmitted to the metal sieving mesh and the synthetic resin sieving mesh through the resonance ring, and at the same time the vibration motor is rotated to rotate. The entire container is vibrated at a low frequency .

  Since high-frequency vibration from the resonance ring is transmitted through the wire mesh, the processing capability is high, and fine powder sieving can be dealt with by setting the resin mesh.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of an ultrasonic vibration sieving machine according to the present invention. 1 is a base, 2 is a bottomed cylindrical vibration container supported by a coil spring 3 on the base, and 4 is the vibration container. The vibration motors 5 and 6 fixed to the lower part of 2 are non-equilibrium weights attached to the motor shaft, and 7 is a sieve discharge cylinder provided on one side of the vibration container. Further, an annular hopper 8 is disposed on the upper part of the vibrating container, and the upper end opening edge of the vibrating container 2 and the hopper are connected by winding a metal band 9.

  As shown in FIGS. 2 and 3, reference numeral 10 denotes an annular frame having a flange 11 formed on the outer periphery, and a plurality of stays 12 are fixed to the frame by welding. An annular resonant ring 13 as a vibration conductor is fixed to the end by welding. The resonant ring 13 is formed in a hollow shape by forming a square pipe into a ring shape. The frame 10 is fixed to the upper part of the vibrating container 2 by sandwiching the flange 11 between the vibrating container 2 and the hopper 8. Reference numeral 14 denotes an ultrasonic oscillator fixed to a part of the resonance ring, and reference numeral 15 denotes a relay socket fixed to the lower surface of the frame body 10 in order to supply a high-frequency current to the oscillator via a cable 16.

  Reference numeral 17 denotes a metal sieving net (hereinafter referred to as a metal mesh) firmly fixed to the upper surface of the resonance ring 13 with an adhesive, and the antistatic treatment is performed on the metal mesh 17 so as to overlap with the non-adhesive state. A synthetic resin sieve net (hereinafter referred to as a resin net) 18 is provided, and the periphery of the metal net 17 and the resin net 18 is sandwiched between the upper surface of the frame 10 and the lower edge surface of the hopper 8. The wire mesh 17 and the resin mesh 18 are stretched in the vibration container 2. The wire mesh 17 is a 100-200 mesh stainless steel wire mesh, and the resin mesh 18 has a mesh size of about 45 microns (330 mesh) smaller than the wire mesh 17.

  In the ultrasonic vibration sieving machine configured as described above, a high frequency current of 20 kHz to 40 kHz is supplied to the ultrasonic oscillator 14 from a generator (not shown) to oscillate the ultrasonic oscillator, and the high frequency vibration is passed through the resonance ring 13. The processed material such as powder loaded on the resin net 18 is screened and discharged from the discharge cylinder 7. Moreover, since the vibration container 2 can be vibrated by rotating the vibration motor 4, low-frequency vibration is added to the high-frequency fine vibration, and the processed material can be efficiently screened.

  Further, the vibration of the resonance ring 13 vibrates the wire mesh 17 fixed on the upper surface thereof, and the vibration of the wire mesh 17 is transmitted to the resin mesh 18, so that the entire surface of the resin mesh 18 vibrates without difficulty, thereby improving the screening processing capability. be able to. In addition, it is easy to transmit a vibration to use the wire mesh 17 of 100-200 mesh.

  In addition, in the conventional ultrasonic vibrating screen machine in which only the wire mesh is stretched, it is costly to replace the wire mesh with a new wire mesh, but in the present invention, the number of resin meshes is reduced. More than the number, the processed material is substantially screened by the resin mesh, the frequency of the wire mesh is reduced, and if the resin mesh is broken, a new resin mesh is placed on the wire mesh. Since it is only necessary to change, there is an advantage that maintenance is easy and cost is reduced. Further, the use of a resin net has an advantage that it can easily cope with fine powder sieving.

Next, an example in which the toner (particle diameter of 45 microns) for an electronic copying machine containing resin powder as a main component is screened for removing foreign substances by the ultrasonic vibration sieving machine will be described. As the wire mesh 17, a stainless steel wire mesh of SUS304 (150 mesh) was used, and a resin mesh 18 with an opening of 45 μm subjected to antistatic treatment was placed thereon. The processing capacity at this time was 670 kg / h.
On the other hand, when the toner was screened only with a SUS316 stainless steel mesh having a mesh size of 45 microns without using a resin mesh, the processing capacity was halved to 286 kg / h.
This difference is presumed to be partly due to the fact that clogging due to static electricity occurs only in the metal mesh, whereas clogging due to static electricity is less likely to occur in the resin net 18. In any case, it has been confirmed that according to the present invention, the processing capability of the ultrasonic vibrating screen can be greatly improved.

The system diagram of the ultrasonic sieving machine which shows the embodiment of the present invention, and its abnormality detection device. The expanded longitudinal cross-sectional view of the principal part of the ultrasonic sieving machine shown in FIG. The perspective view of the lower surface of the sieve net | network of the ultrasonic sieving machine shown in FIG.

Explanation of symbols

2 Vibrating container 13 Resonant ring 14 Ultrasonic oscillator 17 Metal sieve mesh (wire mesh)
18 Sieve mesh made of synthetic resin (resin mesh)

Claims (1)

A vibration container is supported on a base via a coil spring, a vibration motor is fixed to the lower part of the vibration container, and an annular resonance ring is fixed inside the annular frame by welding a plurality of stays. An ultrasonic oscillator is fixed to the lower surface of the resonance ring, a metal sieve mesh of 100 to 200 mesh is fixed to the upper surface of the resonance ring with an adhesive, and the metal sieve mesh is placed on the metal sieve mesh. A synthetic resin sieve mesh having a larger number of meshes is stacked in a non-adhered state, the frame body is placed on the upper end opening edge of the vibrating container, and a hopper is connected to the vibrating container, whereby the metal sieve The peripheral edge of the mesh and the peripheral edge of the synthetic resin sieve mesh are sandwiched between the upper surface of the frame and the lower edge of the hopper, and a high frequency current of 20 kHz to 40 kHz is passed through the ultrasonic oscillator. The ultrasonic oscillator is oscillated and its high frequency Ultrasonic vibration, characterized in that so as to low-frequency vibration of the whole vibration container by the vibration through the resonant ring is transmitted to the metallic sieve screen and synthetic resin sieve screen the vibration motor simultaneously rotates moving Sieve machine.

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